1# $FreeBSD$ 2# 3# This file contains common settings used for building FreeBSD 4# sources. 5 6# Enable various levels of compiler warning checks. These may be 7# overridden (e.g. if using a non-gcc compiler) by defining MK_WARNS=no. 8 9# for 4.2.1 GCC: http://gcc.gnu.org/onlinedocs/gcc-4.2.1/gcc/Warning-Options.html 10# for current GCC: https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html 11# for clang: https://clang.llvm.org/docs/DiagnosticsReference.html 12 13.include <bsd.compiler.mk> 14 15# the default is gnu99 for now 16CSTD?= gnu99 17 18.if ${CSTD} == "c89" || ${CSTD} == "c90" 19CFLAGS+= -std=iso9899:1990 20.elif ${CSTD} == "c94" || ${CSTD} == "c95" 21CFLAGS+= -std=iso9899:199409 22.elif ${CSTD} == "c99" 23CFLAGS+= -std=iso9899:1999 24.else # CSTD 25CFLAGS+= -std=${CSTD} 26.endif # CSTD 27 28.if !empty(CXXSTD) 29CXXFLAGS+= -std=${CXXSTD} 30.endif 31 32# -pedantic is problematic because it also imposes namespace restrictions 33#CFLAGS+= -pedantic 34.if defined(WARNS) 35.if ${WARNS} >= 1 36CWARNFLAGS+= -Wsystem-headers 37.if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE}) 38CWARNFLAGS+= -Werror 39.endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE} 40.endif # WARNS >= 1 41.if ${WARNS} >= 2 42CWARNFLAGS+= -Wall -Wno-format-y2k 43.endif # WARNS >= 2 44.if ${WARNS} >= 3 45CWARNFLAGS+= -W -Wno-unused-parameter -Wstrict-prototypes\ 46 -Wmissing-prototypes -Wpointer-arith 47.endif # WARNS >= 3 48.if ${WARNS} >= 4 49CWARNFLAGS+= -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow\ 50 -Wunused-parameter 51.if !defined(NO_WCAST_ALIGN) && !defined(NO_WCAST_ALIGN.${COMPILER_TYPE}) 52CWARNFLAGS+= -Wcast-align 53.endif # !NO_WCAST_ALIGN !NO_WCAST_ALIGN.${COMPILER_TYPE} 54.endif # WARNS >= 4 55.if ${WARNS} >= 6 56CWARNFLAGS+= -Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls\ 57 -Wold-style-definition 58.if !defined(NO_WMISSING_VARIABLE_DECLARATIONS) 59CWARNFLAGS.clang+= -Wmissing-variable-declarations 60.endif 61.if !defined(NO_WTHREAD_SAFETY) 62CWARNFLAGS.clang+= -Wthread-safety 63.endif 64.endif # WARNS >= 6 65.if ${WARNS} >= 2 && ${WARNS} <= 4 66# XXX Delete -Wuninitialized by default for now -- the compiler doesn't 67# XXX always get it right. 68CWARNFLAGS+= -Wno-uninitialized 69.endif # WARNS >=2 && WARNS <= 4 70CWARNFLAGS+= -Wno-pointer-sign 71# Clang has more warnings enabled by default, and when using -Wall, so if WARNS 72# is set to low values, these have to be disabled explicitly. 73.if ${WARNS} <= 6 74CWARNFLAGS.clang+= -Wno-empty-body -Wno-string-plus-int 75.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30400 76CWARNFLAGS.clang+= -Wno-unused-const-variable 77.endif 78.endif # WARNS <= 6 79.if ${WARNS} <= 3 80CWARNFLAGS.clang+= -Wno-tautological-compare -Wno-unused-value\ 81 -Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion 82.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600 83CWARNFLAGS.clang+= -Wno-unused-local-typedef 84.endif 85.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 40000 86CWARNFLAGS.clang+= -Wno-address-of-packed-member 87.endif 88.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 70000 && \ 89 ${MACHINE_CPUARCH} == "arm" && !${MACHINE_ARCH:Marmv[67]*} 90CWARNFLAGS.clang+= -Wno-atomic-alignment 91.endif 92.endif # WARNS <= 3 93.if ${WARNS} <= 2 94CWARNFLAGS.clang+= -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter 95.endif # WARNS <= 2 96.if ${WARNS} <= 1 97CWARNFLAGS.clang+= -Wno-parentheses 98.endif # WARNS <= 1 99.if defined(NO_WARRAY_BOUNDS) 100CWARNFLAGS.clang+= -Wno-array-bounds 101.endif # NO_WARRAY_BOUNDS 102.endif # WARNS 103 104.if defined(FORMAT_AUDIT) 105WFORMAT= 1 106.endif # FORMAT_AUDIT 107.if defined(WFORMAT) 108.if ${WFORMAT} > 0 109#CWARNFLAGS+= -Wformat-nonliteral -Wformat-security -Wno-format-extra-args 110CWARNFLAGS+= -Wformat=2 -Wno-format-extra-args 111.if ${WARNS} <= 3 112CWARNFLAGS.clang+= -Wno-format-nonliteral 113.endif # WARNS <= 3 114.if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE}) 115CWARNFLAGS+= -Werror 116.endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE} 117.endif # WFORMAT > 0 118.endif # WFORMAT 119.if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE}) 120CWARNFLAGS+= -Wno-format 121.endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE} 122 123# GCC 5.2.0 124.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 50200 125CWARNFLAGS+= -Wno-error=address \ 126 -Wno-error=array-bounds \ 127 -Wno-error=attributes \ 128 -Wno-error=bool-compare \ 129 -Wno-error=cast-align \ 130 -Wno-error=clobbered \ 131 -Wno-error=enum-compare \ 132 -Wno-error=extra \ 133 -Wno-error=inline \ 134 -Wno-error=logical-not-parentheses \ 135 -Wno-error=strict-aliasing \ 136 -Wno-error=uninitialized \ 137 -Wno-error=unused-but-set-variable \ 138 -Wno-error=unused-function \ 139 -Wno-error=unused-value 140.endif 141 142# GCC 6.1.0 143.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 60100 144CWARNFLAGS+= -Wno-error=misleading-indentation \ 145 -Wno-error=nonnull-compare \ 146 -Wno-error=shift-negative-value \ 147 -Wno-error=tautological-compare \ 148 -Wno-error=unused-const-variable 149.endif 150 151# GCC 7.1.0 152.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 70100 153CWARNFLAGS+= -Wno-error=bool-operation \ 154 -Wno-error=deprecated \ 155 -Wno-error=expansion-to-defined \ 156 -Wno-error=format-overflow \ 157 -Wno-error=format-truncation \ 158 -Wno-error=implicit-fallthrough \ 159 -Wno-error=int-in-bool-context \ 160 -Wno-error=memset-elt-size \ 161 -Wno-error=noexcept-type \ 162 -Wno-error=nonnull \ 163 -Wno-error=pointer-compare \ 164 -Wno-error=stringop-overflow 165.endif 166 167# GCC 8.1.0 168.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 80100 169CWARNFLAGS+= -Wno-error=aggressive-loop-optimizations \ 170 -Wno-error=cast-function-type \ 171 -Wno-error=catch-value \ 172 -Wno-error=multistatement-macros \ 173 -Wno-error=restrict \ 174 -Wno-error=sizeof-pointer-memaccess \ 175 -Wno-error=stringop-truncation 176.endif 177 178# How to handle FreeBSD custom printf format specifiers. 179.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600 180FORMAT_EXTENSIONS= -D__printf__=__freebsd_kprintf__ 181.else 182FORMAT_EXTENSIONS= -fformat-extensions 183.endif 184 185.if defined(IGNORE_PRAGMA) 186CWARNFLAGS+= -Wno-unknown-pragmas 187.endif # IGNORE_PRAGMA 188 189# We need this conditional because many places that use it 190# only enable it for some files with CLFAGS.$FILE+=${CLANG_NO_IAS}. 191# unconditionally, and can't easily use the CFLAGS.clang= 192# mechanism. 193.if ${COMPILER_TYPE} == "clang" 194CLANG_NO_IAS= -no-integrated-as 195.endif 196CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\ 197 -mllvm -simplifycfg-dup-ret 198.if ${COMPILER_VERSION} >= 30500 && ${COMPILER_VERSION} < 30700 199CLANG_OPT_SMALL+= -mllvm -enable-gvn=false 200.else 201CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false 202.endif 203CFLAGS.clang+= -Qunused-arguments 204.if ${MACHINE_CPUARCH} == "sparc64" 205# Don't emit .cfi directives, since we must use GNU as on sparc64, for now. 206CFLAGS.clang+= -fno-dwarf2-cfi-asm 207.endif # SPARC64 208# The libc++ headers use c++11 extensions. These are normally silenced because 209# they are treated as system headers, but we explicitly disable that warning 210# suppression when building the base system to catch bugs in our headers. 211# Eventually we'll want to start building the base system C++ code as C++11, 212# but not yet. 213CXXFLAGS.clang+= -Wno-c++11-extensions 214 215.if ${MK_SSP} != "no" && \ 216 ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips" 217.if (${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30500) || \ 218 (${COMPILER_TYPE} == "gcc" && \ 219 (${COMPILER_VERSION} == 40201 || ${COMPILER_VERSION} >= 40900)) 220# Don't use -Wstack-protector as it breaks world with -Werror. 221SSP_CFLAGS?= -fstack-protector-strong 222.else 223SSP_CFLAGS?= -fstack-protector 224.endif 225CFLAGS+= ${SSP_CFLAGS} 226.endif # SSP && !ARM && !MIPS 227 228# Additional flags passed in CFLAGS and CXXFLAGS when MK_DEBUG_FILES is 229# enabled. 230DEBUG_FILES_CFLAGS?= -g 231 232# Allow user-specified additional warning flags, plus compiler and file 233# specific flag overrides, unless we've overridden this... 234.if ${MK_WARNS} != "no" 235CFLAGS+= ${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}} 236CFLAGS+= ${CWARNFLAGS.${.IMPSRC:T}} 237.endif 238 239CFLAGS+= ${CFLAGS.${COMPILER_TYPE}} 240CXXFLAGS+= ${CXXFLAGS.${COMPILER_TYPE}} 241 242AFLAGS+= ${AFLAGS.${.IMPSRC:T}} 243ACFLAGS+= ${ACFLAGS.${.IMPSRC:T}} 244CFLAGS+= ${CFLAGS.${.IMPSRC:T}} 245CXXFLAGS+= ${CXXFLAGS.${.IMPSRC:T}} 246 247LDFLAGS+= ${LDFLAGS.${LINKER_TYPE}} 248 249.if defined(SRCTOP) 250# Prevent rebuilding during install to support read-only objdirs. 251.if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta) 252CFLAGS+= ERROR-tried-to-rebuild-during-make-install 253.endif 254.endif 255 256# Tell bmake not to mistake standard targets for things to be searched for 257# or expect to ever be up-to-date. 258PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \ 259 beforelinking build build-tools buildconfig buildfiles \ 260 buildincludes check checkdpadd clean cleandepend cleandir \ 261 cleanobj configure depend distclean distribute exe \ 262 files html includes install installconfig installdirs \ 263 installfiles installincludes lint obj objlink objs objwarn \ 264 realinstall tags whereobj 265 266# we don't want ${PROG} to be PHONY 267.PHONY: ${PHONY_NOTMAIN:N${PROG:U}} 268.NOTMAIN: ${PHONY_NOTMAIN:Nall} 269 270.if ${MK_STAGING} != "no" 271.if defined(_SKIP_BUILD) || (!make(all) && !make(clean*)) 272_SKIP_STAGING?= yes 273.endif 274.if ${_SKIP_STAGING:Uno} == "yes" 275staging stage_libs stage_files stage_as stage_links stage_symlinks: 276.else 277# allow targets like beforeinstall to be leveraged 278DESTDIR= ${STAGE_OBJTOP} 279.export DESTDIR 280 281.if target(beforeinstall) 282.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 283staging: beforeinstall 284.endif 285.endif 286 287# normally only libs and includes are staged 288.if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG) 289STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR} 290 291.if !empty(PROG) 292.if defined(PROGNAME) 293STAGE_AS_SETS+= prog 294STAGE_AS_${PROG}= ${PROGNAME} 295stage_as.prog: ${PROG} 296.else 297STAGE_SETS+= prog 298stage_files.prog: ${PROG} 299STAGE_TARGETS+= stage_files 300.endif 301.endif 302.endif 303 304.if !empty(_LIBS) && !defined(INTERNALLIB) 305.if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != "" 306STAGE_SETS+= shlib 307STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR} 308STAGE_FILES.shlib+= ${_LIBS:M*.so.*} 309stage_files.shlib: ${_LIBS:M*.so.*} 310.endif 311 312.if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld) 313STAGE_AS_SETS+= ldscript 314STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld 315stage_as.ldscript: ${SHLIB_LINK:R}.ld 316STAGE_DIR.ldscript = ${STAGE_LIBDIR} 317STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK} 318NO_SHLIB_LINKS= 319.endif 320 321.if target(stage_files.shlib) 322stage_libs: ${_LIBS} 323.if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 324stage_files.shlib: ${SHLIB_NAME}.symbols 325.endif 326.else 327stage_libs: ${_LIBS} 328.endif 329.if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 330stage_libs: ${SHLIB_NAME}.symbols 331.endif 332 333.endif 334 335.if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes) 336.if !defined(NO_BEFOREBUILD_INCLUDES) 337stage_includes: buildincludes 338beforebuild: stage_includes 339.endif 340.endif 341 342.for t in stage_libs stage_files stage_as 343.if target($t) 344STAGE_TARGETS+= $t 345.endif 346.endfor 347 348.if !empty(STAGE_AS_SETS) 349STAGE_TARGETS+= stage_as 350.endif 351 352.if !empty(STAGE_TARGETS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 353 354.if !empty(LINKS) 355STAGE_TARGETS+= stage_links 356.if ${MAKE_VERSION} < 20131001 357stage_links.links: ${_LIBS} ${PROG} 358.endif 359STAGE_SETS+= links 360STAGE_LINKS.links= ${LINKS} 361.endif 362 363.if !empty(SYMLINKS) 364STAGE_TARGETS+= stage_symlinks 365STAGE_SETS+= links 366STAGE_SYMLINKS.links= ${SYMLINKS} 367.endif 368 369.endif 370 371.include <meta.stage.mk> 372.endif 373.endif 374 375.if defined(META_TARGETS) 376.for _tgt in ${META_TARGETS} 377.if target(${_tgt}) 378${_tgt}: ${META_DEPS} 379.endif 380.endfor 381.endif 382